Perovskites spectroscopic studies

Shin, S Arakawa, H Hatakeyama, Y Ogawa, K Shimomura, K. Absorption of NO in the lattice of an oxygen-deficient perovskite SrFeOs.x and the infrared spectroscopic study of the system NO-SrFeOs.x. Mater. Res. Bull, 1979, Volume 14, Issue 5, 633-639. 

A quantitative analysis of grain boundary impedances measured with macroscopic electrodes can be rather problematic if grain boundary properties vary from boundary to boundary (cf. Sec. 3.2). Hence, additional information on the distribution of grain boundary resistivities is often desired. Microelectrode measurements can yield such additional information (Sec. 4.2) and below a microcontact impedance spectroscopic study of grain boundaries in a polycrystal is exemplarily presented. The material of choice is again SrTiCE (0.2 mol % Fe-doped), which represents a model material for the technologically highly important class of perovskite-type titanates (see also above). 

Photoreactivitv. It is noticed from the Table that only the sorbic acid derivatives are reactive upon UV- and y-irradiation. From spectroscopic studies of the reaction products a 1,4-addition reaction of the unsaturated units is evident. For example, spectral changes of 1ft in the infrared are essentially identical wi those observed in layer perovskites (compare Figures 12 and 2). c-NHfi-spectra of U are also consistent with a 1,4-trans-adduct (Figure 13). Especially the signal of carbon atom (a) exhibits a splitting, which could indicate the presence of configurational isomers. Further studies are necessary to analyze the stereoregularity of the polymer of la. 

Cooper SL (2001) Optical Spectroscopic Studies of Metal-Insulator Transitions in Perovskite-Related Oxides. 98 161-220 Cooper SR, Rawle SC (1990) Crown Thioether Chemistry. 72 1-72... 

Wan et al. (170) carried out an IR spectroscopic study of the adsorption of S02 on partially substituted lanthanum and cobalt perovskites. The spectrum of Lao.6Sro.4Coi, Mjc03 after poisoning with S02 at 200°C included bands at 1133 and 994 cm-1 that are assigned to a bridging structure of adsorbed S02 (species I) ... 

Optical Spectroscopic Studies of Metal-Insulator Transitions in Perovskite-Related Oxides... 

Cooper SL (2001) Optical Spectroscopic Studies of Metal-Insulator Transitions in Perovskite-Related Oxides. 98 161-220 Cooper SR, Rawle SC (1990) Crown Thioether Chemistry. 72 1-72 Corbett JD (1997) Diverse Naked Clusters of the Heavy Main-Group Elements. Electronic Regularities and Analogies. 87 157-194 Corbin PS, see Zimmerman SC (2000) 96 63-94... 

Shin S, Arakawa H, Hatakeyama Y, Ogawa K, Shimomura K. (1979). Absorption of No in the Lattice of an Oxygen-Deficient Perovskite Srfeo3-X and the Infrared Spectroscopic Study of the System No - Srfeo3-X. Mater Res Bull. 14, 633-9. 

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